Khusf County (Persian: شهرستان خوسف) is a county in South Khorasan Province, Iran. At the 2006 census, its population was 24,922, in 7,254 families. The county has two districts (bakhsh): the Central District and Jolgeh-e Mazhan District.
The County has two cities: Khusf and Mohammadshahr.
Reference: www.wikipedia.org